CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 330 · 40 questions

Code tip (Red, green, blue): rgb(red, green, blue): each from 0 to 255. #rrggbb: the same three numbers in hex. Hex digits: 0–9, then a = 10, b = 11, c = 12, d = 13, e = 14, f = 15. A pair = 16 × first digit + second digit: ff = 16 × 15 + 15 = 255.

1. 1.🌈 Which hex code is magenta? (a) #000000 (b) #ffffff (c) #ff00ff (d) #00ffff
2. 2.🌈 Which colour is #0000ff? (a) cyan (b) magenta (c) blue (d) bright green
3. 3.🌈 Which colour is #00ffff? (a) white (b) cyan (c) yellow (d) magenta
4. 4.🌈 How many pairs of hex digits are in a colour like #ff8800? (a) 3 (b) 6 (c) 2 (d) 4
5. 5.🌈 In #00da00 the green part is the hex number da. What is it as a normal number?
6. 6.🌈 In #620000 the red part is the hex number 62. What is it as a normal number?
7. 7.🌈 Which colour is #ff0000? (a) yellow (b) cyan (c) white (d) red
8. 8.🌈 In #rrggbb, which colour do the last two digits give? (a) red (b) white (c) green (d) blue
9. 9.🌈 Which hex code is yellow? (a) #ff0000 (b) #0000ff (c) #ffff00 (d) #ffffff
10. 10.🌈 Which colour is rgb(255, 0, 255)? (a) blue (b) white (c) bright green (d) magenta
11. 11.🌈 Which colour is rgb(255, 0, 0)? (a) red (b) yellow (c) black (d) blue
12. 12.🌈 Which hex code is cyan? (a) #ff0000 (b) #ffff00 (c) #00ffff (d) #000000
13. 13.🌈 Which colour is rgb(0, 255, 255)? (a) cyan (b) yellow (c) magenta (d) red
14. 14.🌈 In #8f0000 the red part is the hex number 8f. What is it as a normal number?
15. 15.🌈 Which colour is #00ff00? (a) magenta (b) white (c) blue (d) bright green
16. 16.🌈 Which colour of light is strongest in rgb(11, 157, 0)? (a) green (b) blue (c) red
17. 17.🌈 In #rrggbb, which colour do the first two digits give? (a) black (b) blue (c) green (d) red
18. 18.🌈 What is the biggest number one colour can have in rgb()? (a) 1000 (b) 99 (c) 100 (d) 255
19. 19.🌈 Which colour is rgb(0, 0, 0)? (a) bright green (b) yellow (c) red (d) black
20. 20.🌈 In #00a900 the green part is the hex number a9. What is it as a normal number?
21. 21.🌈 Which colour is rgb(255, 255, 0)? (a) red (b) cyan (c) yellow (d) bright green
22. 22.🌈 Which colour is #ff00ff? (a) blue (b) magenta (c) white (d) bright green
23. 23.🌈 Which hex code is red? (a) #00ff00 (b) #000000 (c) #ff00ff (d) #ff0000
24. 24.🌈 In #000072 the blue part is the hex number 72. What is it as a normal number?
25. 25.🌈 Which colour of light is strongest in rgb(13, 122, 170)? (a) blue (b) green (c) red
26. 26.🌈 Hex digits go 0 to 9, then A to which letter? (a) J (b) F (c) Z (d) G
27. 27.🌈 In #005f00 the green part is the hex number 5f. What is it as a normal number?
28. 28.🌈 Which colour is rgb(0, 255, 0)? (a) cyan (b) yellow (c) bright green (d) blue
29. 29.🌈 Which colour is #000000? (a) bright green (b) yellow (c) black (d) blue
30. 30.🌈 In #001e00 the green part is the hex number 1e. What is it as a normal number?
31. 31.🌈 In #400000 the red part is the hex number 40. What is it as a normal number?
32. 32.🌈 Which colour of light is strongest in rgb(249, 119, 61)? (a) green (b) blue (c) red
33. 33.🌈 Which colour of light is strongest in rgb(157, 85, 108)? (a) red (b) green (c) blue
34. 34.🌈 Which colour of light is strongest in rgb(55, 51, 248)? (a) red (b) blue (c) green
35. 35.🌈 Which hex code is black? (a) #000000 (b) #ff0000 (c) #0000ff (d) #ff00ff
36. 36.🌈 Which colour of light is strongest in rgb(229, 20, 88)? (a) red (b) blue (c) green
37. 37.🌈 In #000063 the blue part is the hex number 63. What is it as a normal number?
38. 38.🌈 Which colour is #ffffff? (a) white (b) blue (c) red (d) magenta
39. 39.🌈 Which colour is rgb(0, 0, 255)? (a) bright green (b) blue (c) yellow (d) cyan
40. 40.🌈 Which hex code is white? (a) #ff00ff (b) #000000 (c) #0000ff (d) #ffffff

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